Although marred by the presence of galls, is a very strong and resistant tree which survives in degraded areas where other species have been eliminated.

Some scientists are talking about taking pollen from resistant trees in Glacier or Idaho and doing the same thing.

Replanting using resistant trees has taken place since then, but the area covered by cedar is only 10% of what it formerly was.

Besides purchasing particularly resistant trees, you can take basic steps to increase the chance of your tree surviving the next storm that hits it.

A hardy tree resistant to pests and pollution, it has taken a prominent place in Western cities.

There is no known treatment for the butternut fungus, so conservation efforts are focused on finding and protecting resistant trees.

Under the back-breeding program such a partly resistant tree is bred with another American chestnut.

Research has focused on determining the dynamics and mechanisms of spread, as well as attempts to breed resistant trees.

The Guinea Savanna consists of short deciduous and fire resistant trees.

However, the process of restoring the ash tree population across Europe with resistant trees is likely to take decades.